{
  "manageEntity": {
    "action": "Save",
    "entityId": "1342514951",
    "entityType": "Track",
    "nonce": "0x3db717a30f27f92f62954c400a579a6aad846d77db24fc0af6e2dfb81e5836f4",
    "signature": "0x4b1d48e798d846fd90a475f37199805c5de88a2b233bf3b30b75b5cee04fb41d1672a0445ab7de5590c62fecfbe17f6906004a329ae5ee22ab2c15f6aa91a7031c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}